JKCET SERIES Physics
Communication Systems
10 previous year questions.
Volume: 10 Ques
Yield: Medium
High-Yield Trend
1
2019 1
2018 2
2017 1
2015 2
2014 1
2012 2
2011 Chapter Questions 10 MCQs
01
PYQ 2011
medium
physics ID: jkcet-20
A TV tower has a height 150 m. What is the total population covered by the TV tower, if the population density around the TV tower is Radius of the earth is
1
60.288 lakh
2
40.192 lakh
3
100 lakh
4
20.22 lakh
02
PYQ 2011
medium
physics ID: jkcet-20
What fraction of the surface area of earth can be covered to establish communication by one geostationary statellite?
1
2
3
4
03
PYQ 2012
medium
physics ID: jkcet-20
In television transmission what type of modulation is used ?
1
Only amplitude modulation
2
Only frequency modulation
3
Both amplitude and frequency modulation
4
TV signal does not need any kind of modulation
04
PYQ 2014
medium
physics ID: jkcet-20
In a video signal for transmission of picture, what value of bandwidth is used in communication system?
1
2
3
4
05
PYQ 2014
medium
physics ID: jkcet-20
The waves used for line-of-sight communication is
1
ground waves
2
space waves
3
soundwaves
4
sky waves
06
PYQ 2015
medium
physics ID: jkcet-20
Which of the following is incorrect about sky waves?
1
Sky waves are not used in long distance communication
2
Their propagation takes place by total internal reflection
3
Sky waves support the so-called AM band
4
The frequency of sky waves ranges typically from 3 MHz to 30 MHz
07
PYQ 2017
medium
physics ID: jkcet-20
Which of the following is the indirect way of generating ?
1
Reactance modulator
2
Varactor diode modulator
3
Armstrong modulator
4
Reactance bipolar transistor modulator
08
PYQ 2017
easy
physics ID: jkcet-20
Amplitude modulation is the process of
1
superimposing a high frequency signal on a low frequency carrier signal
2
superimposing a low frequency signal on a high frequency carrier signal
3
single-sideband communication
4
amplitude shift and phase shift
09
PYQ 2018
medium
physics ID: jkcet-20
What modulation index and side bands are produced when a message of frequency and peak voltage of volts is used to modulate a carrier frequency of and peak voltage of 20 volts ?
1
Modulation index is . The side bands are
2
Modulation index is . The side bands are
3
Modulation index is . The side bands are
4
Modulation index is . The side bands are
10
PYQ 2019
medium
physics ID: jkcet-20
A carrier wave is modulated by an audio signal of frequency range . What is the bandwidth of the channel?
1
2
3
4
About Communication Systems - JKCET
Communication Systems is a vital chapter for JKCET aspirants. Mastering the concepts covered in this chapter is essential for securing a top rank.
By rigorously practicing the previous year questions associated with this chapter, you can identify high-yield topics, understand the examiner's perspective, and boost your confidence during the actual exam.
Frequently Asked Questions
Why focus on Communication Systems PYQs?
Analyzing PYQs for this specific chapter reveals the most frequently tested concepts and the typical complexity of questions, allowing you to tailor your study plan efficiently.
How to best use this analysis?
Review the topic breakdown to see which sub-topics within Communication Systems carry the most weight. Then, tackle the questions iteratively to solidify your understanding.